The following are examples of the DEFRAGMENT VOLUME command:

    1.$ DEFRAGMENT VOLUME DISK$USER_1

      This command defragments DISK$USER_1 using default qualifiers.
      The defragmentation process executes only once. In a VAXcluster
      system, the defragment operation begins on a node selected at
      random from among those nodes in the scheduling database having
      fewer executing processes than the limit imposed by the SET
      PROCESS_LIMIT={value} subcommand. If all nodes are busy with
      a maximum number of defragment processes, the script does not
      execute until one of the outstanding defragmentation operations
      concludes.

      After the defragmentation process stops, the script is removed
      from the scheduling database.

    2.$ DEFRAGMENT VOLUME DISK$ONE/SCRIPT=MY_SCRIPT/IGNORE=(INDEXED,PLACED)-
             /INTERVAL=2-00:00/FREQUENT=*.EXE/LOG=MYLOG.LOG/FULL/DORMANT=*.ARCHIVE-
             /NODE=(N1, N2)

      This command does the following:

      o  Defragments DISK$ONE.

      o  Names the script MY_SCRIPT.

      o  Instructs the defragmentation process to ignore all RMS
         indexed files and files with explicit placement control
         information in their headers. (These files are added to the
         EXCLUDE list.)

      o  Instructs the scheduler to execute this script every two
         days.

      o  Instructs the defragmentation process that all .EXE files on
         the entire volume should be considered frequently accessed
         when final file placement decisions are made.

      o  Requests a log file, MYLOG.LOG, which is placed in the
         directory from which this command was entered.

      o  Requests a /FULL log file.

      o  Instructs the defragmentation process that all .ARCHIVE
         files on the entire volume should be considered dormant
         (rarely accessed) when final file placement decisions are
         made.

      o  Limits the nodes available for the defragmentation process
         to nodes N1 and N2.

    3.$ DEFRAGMENT VOLUME DISK$TWO/INHERIT=MY_SCRIPT/SCRIPT=FIRST_SCRIPT

      This command inherits the script defined in the previous
      example. Thus, it creates a new script that is the same as
      MY_SCRIPT, except for the following differences:

      o  The script name is FIRST_SCRIPT instead of MY_SCRIPT.

      o  The target volume is DISK$TWO instead of DISK$ONE.

      In this case, MYLOG.LOG is also inherited. Thus, one version
      of the log file contains data from MY_SCRIPT, and the other
      version contains data from FIRST_SCRIPT. To prevent log file
      inheritance, specify the /LOG qualifier.

    4.$ DEFRAGMENT VOLUME DISK$ONE/SCRIPT=SECOND_SCRIPT-
             /PREDECESSOR=FIRST_SCRIPT

      This commands links SECOND_SCRIPT to FIRST_SCRIPT using the
      /PREDECESSOR qualifier. SECOND_SCRIPT does not execute until
      FIRST_SCRIPT completes successfully. SECOND_SCRIPT uses default
      parameters. Note that this example uses the DEFRAGMENT VOLUME
      command from within the Disk File Optimizer utility.

    5.$ DEFRAGMENT VOLUME DISK$ONE/SCRIPT=AFTER_SCRIPT/AFTER="+00:05"

      This command creates the script AFTER_SCRIPT, and it will start
      executing in 5 minutes.